java.lang.reflect.Field的getName()方法用于获取由此Field对象表示的字段的名称。当一个类包含一个字段并且我们想要获取该字段的名称时,我们可以使用此方法返回Field的名称。
用法:
public String getName()
参数:此方法不接受任何内容。
返回值:此方法返回一个String,它是基础成员的简单名称。
以下示例程序旨在说明getName()方法:
示例1:
// Java program to demonstrate getName() method
import java.lang.reflect.Field;
public class GFG {
public static void main(String[] args)
throws Exception
{
// Get the marks field object
Field field = User.class
.getField("Marks");
// Apply getName Method on User Object
// to get the name of Marks field
String value = field.getName();
// print result
System.out.println("Name"
+ " is " + value);
// Now Get the Fees field object
field = User.class.getField("Fees");
// Apply getName Method on User Object
// to get the name of Fees field
value = field.getName();
// print result
System.out.println("Name"
+ " is " + value);
// Now Get the name field object
field = User.class.getField("name");
// Apply getName Method on User Object
// to get the name of name field
value = field.getName();
// print result
System.out.println("Name"
+ " is " + value);
}
}
// sample User class
class User {
// static double values
public static double Marks = 34.13;
public static float Fees = 3413.99f;
public static String name = "Aman";
public static double getMarks()
{
return Marks;
}
public static void setMarks(double marks)
{
Marks = marks;
}
public static float getFees()
{
return Fees;
}
public static void setFees(float fees)
{
Fees = fees;
}
public static String getName()
{
return name;
}
public static void setName(String name)
{
User.name = name;
}
}
输出:
Name is Marks Name is Fees Name is name
示例2:
// Java program to demonstrate getName() method
import java.lang.reflect.Field;
import java.time.Month;
public class GFG {
public static void main(String[] args)
throws Exception
{
// Get all field objects of Month class
Field[] fields = Month.class.getFields();
for (int i = 0; i < fields.length; i++) {
// print name of Fields
System.out.println("Name of Field:"
+ fields[i].getName());
}
}
}
输出:
Name of Field:JANUARY Name of Field:FEBRUARY Name of Field:MARCH Name of Field:APRIL Name of Field:MAY Name of Field:JUNE Name of Field:JULY Name of Field:AUGUST Name of Field:SEPTEMBER Name of Field:OCTOBER Name of Field:NOVEMBER Name of Field:DECEMBER
参考文献: https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html#getName–
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注:本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 Field getName() method in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。